[Tkinter] ttk-->treeview-->tag_configure() not work over Python3.6

[hqbfljx]

Deanhystad wites:
I am using Python 3.8.2 and I don't see any red or yellow when I click on items

I'm using Linux Mint 20, and I see both red and yellow.
Is this perhaps OS related?

I use Windows 10 + anaconda.
But as I said previous that when use python3.6 is OK, just as what your screenshot shows. but while use python 3.7 or later version, the effects gone!